;;; dashundergaps.el --- AUCTeX style for `dashundergaps.sty' (v2.0d)  -*- lexical-binding: t; -*-

;; Copyright (C) 2018, 2020 Free Software Foundation, Inc.

;; Author: Arash Esbati <arash@gnu.org>
;; Maintainer: auctex-devel@gnu.org
;; Created: 2018-11-24
;; Keywords: tex

;; This file is part of AUCTeX.

;; AUCTeX is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by the
;; Free Software Foundation; either version 3, or (at your option) any
;; later version.

;; AUCTeX is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
;; for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This file adds support for `dashundergaps.sty' v2.0d from
;; 2018/11/18.  `dashundergaps.sty' is part of TeXLive.

;;; Code:

(require 'tex)
(require 'latex)

;; Silence the compiler:
(declare-function font-latex-add-keywords
                  "font-latex"
                  (keywords class))

(defvar LaTeX-dashundergaps-key-val-options
  `(;; 2.1.1 Gap modes
    ("teacher-mode" ("true" "false"))
    ("gap-mode"     ("true" "false"))
    ("teachermode"  ("true" "false"))
    ;; 2.1.2 Gap formatting
    ("gap-format"        ("underline" "double-underline"
                          "dash" "dot" "wave" "blank"))
    ("gap-format-adjust"  ("true" "false"))
    ("teacher-gap-format" ("underline" "double-underline"
                           "dash" "dot" "wave" "blank"))
    ("gap-font" ,(mapcar (lambda (x)
                           (concat TeX-esc x))
                         '("rmfamily" "sffamily" "ttfamily" "mdseries" "bfseries"
                           "upshape" "itshape" "slshape" "scshape"
                           "tiny"  "scriptsize" "footnotesize"
                           "small" "normalsize" "large"
                           "Large" "LARGE" "huge" "Huge" "normalfont")))
    ("dash")
    ("dot")
    ;; 2.1.3 Gap numbers
    ("gap-numbers"        ("true" "false"))
    ("gap-number-format")
    ("numbers")
    ("display-total-gaps" ("true" "false"))
    ("displaynbgaps")
    ;; 2.1.4 Gap widening
    ("gap-widen"          ("true" "false"))
    ("gap-extend-minimum" ,(mapcar (lambda (x)
                                     (concat TeX-esc x))
                                   (mapcar #'car (LaTeX-length-list))))
    ("gap-extend-percent")
    ("widen"))
  "Key=value options for dashundergaps macro.")

(TeX-add-style-hook
 "dashundergaps"
 (lambda ()

   ;; 2 The user interface
   (TeX-add-symbols
    '("gap"  [ TeX-arg-key-val LaTeX-dashundergaps-key-val-options ] t)
    '("gap*" [ TeX-arg-key-val LaTeX-dashundergaps-key-val-options ] t)

    '("TeacherModeOn" 0)
    '("TeacherModeOff" 0)

    '("dashundergapssetup"
      (TeX-arg-key-val LaTeX-dashundergaps-key-val-options)))

   ;; Fontification
   (when (and (featurep 'font-latex)
              (eq TeX-install-font-lock 'font-latex-setup))
     (font-latex-add-keywords '(("gap" "*[{"))
                              'textual)
     (font-latex-add-keywords '(("dashundergapssetup" "{")
                                ("TeacherModeOn"      "")
                                ("TeacherModeOff"     ""))
                              'function)))
 TeX-dialect)

(defvar LaTeX-dashundergaps-package-options nil
  "Package options for the dashundergaps package.")

;;; dashundergaps.el ends here
